do you guys realize that everyone who has ever lived in history could fit in the state of massachusets..which is a very very small state. diseases can change and mutate faster than we can cure them, TB is starting to mutate into a form that is resiliant to penisillen...meaning that possibly soon tuberculosis, one of the biggest killers in history, will once again be incurable. look at past history flu viruses, every few decades theres a big outbreak. the 1918 spanish flue wiped out nearly a third of the population at the time. the black plague in europe in the medieval times also wiped out MASSIVE amounts of people. there will always be diseases to control the population. all it takes is one person getting to close to a bird in asia while that person has normal flu, the two flu strains mix and presto...a super flu that has the potential to kill 75% (i think) of the people that contract the disease. think about this. hitler did his best to kill as many jews as he could, he killed people nearly 24 hours a day for 4 years..about. he succeded in killing around 2-3million people. the spanish flu was around for around 6 months (flu season) it killed somewhere around 60 million people. diseases are incredibly resiliant, there is NOTHING we can do to stop them, for every cure there will be a new disease around the corner waiting to wipe of loads of people. High population and density is a heaven for infectious diseases, all it takes is 1 outbreak and we will be reduced greatly. long story short....theres no way were goin to overpopulate that much, we WILL get it eventually